Improving the Quality of Binder from Bottom Ash to Develop the Performance of Corrosion Protection in Reinforced Concrete

Abstract

This study focused on the ability of developing strength and corrosion protection in reinforced concrete by using partial bottom ash as a binder material. Improved the quality of the bottom ash by sieving through a standard sieve No. 30 and then grinding until the particles retained on a sieve No. 325 about 5% by weight to enhance its pozzolanic properties and replacing Portland cement type I at the rate of 35% by weight of binder (BA). The test results showed that the BA concrete had compressive strength at 7 and 28 days of 394 and 496 kg/cm2, respectively, which could reduce the cement consumption about 135 kg/m3. In the test of the electrical current of the reinforcing steel bar embedding in concrete showed the results of BA concrete was approximately 3-4 times lower than the control concrete. In addition, the ability to resist rust of steel reinforced concrete is at a level with a probability of 90% that it will not rust. Including the test results of weight loss of steel bar, it found that the using bottom ash as binder in concrete had the weight loss of steel bar only 0.46% by weight, while the control concrete at the water to binder ratio of 0.45 and 0.55 had a weight loss of steel high as 1.09% and 1.27% by weight, respectively. As a consequence, this can be clearly stated that the ground bottom ash has a high potential to be used as a pozzolanic material.